I translate Nihonkoku Shoukan Light Novel, so the peeps on my Discord says: Hey Nihonkoku Shoukan got a manga, so we slowly and leisurely translate the manga too (while discussing in Discord)... That's how our group first participate in manga scanlation.
For The Sorcerer King and The Barbarian Queen, it was because after I finished rushing Nihonkoku Shoukan manga and caught up with the RAW, I was reading the title and the Group Chapter 1 basically says: Contact your favorite translator group to pick this series. Fortunately, I know someone who can do stuff like this... Which is me, but honestly, translating that one chapter took so many efforts that I ended up burned out. Hence, afterward, we do our stuff slowly...
Oh... I don't think we will ever accept any commission TLs, since honestly, we are either bunch of dudes with a full day job or just plain lazy yukkuris...